The anti-shore erosion measure in the Niigata West Coast has been passed over about 25 years. These measures have composed of submerged breakwater, a jetty and nourishment. The beach (800, 000 m3 nourishment sand has been used) has changed to a very large sandy beach and been utilized by citizen as the place of recreation and relaxation. The calculation result of the flow has been improved due to the addition of wind stress which was not applied in the past for the purpose of reproducing the flow around submerged breakwater located offshore. In addition to the above, the prediction of topographic change around submerged breakwater has been also improved by the incorporation of development pattern of waves in Niigata Beach into the calculation condition.